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Loans - Accretable Yield or Income Expected to be Collected (Details) - Loans Purchased With Evidence of Credit Deterioration - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Beginning balance | $ 2,906 | $ 2,652
Additions |  | 2,002
Accretion |  | (1,203)
Reclassification from nonaccretable difference |  | 0
Disposals |  | (545)
Ending balance |  | 2,906
Heartland |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Beginning balance | 142 | 174
Additions |  | 0
Accretion |  | (32)
Reclassification from nonaccretable difference |  | 0
Disposals |  | 0
Ending balance |  | 142
Summit |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Beginning balance | 22 | 42
Additions |  | 0
Accretion |  | (9)
Reclassification from nonaccretable difference |  | 0
Disposals |  | (11)
Ending balance |  | 22
Kosciusko |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Beginning balance | 235 | 300
Additions |  | 0
Accretion |  | (63)
Reclassification from nonaccretable difference |  | 0
Disposals |  | (2)
Ending balance |  | 235
LaPorte |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Beginning balance | 722 | 829
Additions |  | 0
Accretion |  | (111)
Reclassification from nonaccretable difference |  | 0
Disposals |  | 4
Ending balance |  | 722
Lafayette |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Beginning balance | 290 | 609
Additions |  | 0
Accretion |  | (126)
Reclassification from nonaccretable difference |  | 0
Disposals |  | (193)
Ending balance |  | 290
Wolverine |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Beginning balance | 120 | 698
Additions |  | 0
Accretion |  | (272)
Reclassification from nonaccretable difference |  | 0
Disposals |  | (306)
Ending balance |  | 120
Salin |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Beginning balance | 1,375 | 0
Additions | 2,002 |
Accretion | (590) |
Reclassification from nonaccretable difference | 0 |
Disposals | $ (37) |
Ending balance |  | $ 1,375

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- Definition Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Additions (Disposals) of Loans + References No definition available. + Details
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- Definition Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118938799&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544 + Details
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- Definition Amount of accretion recognized for the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities, with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118938799&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544 + Details
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- Definition Amount of additions to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118938799&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544 + Details
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